woothemes/woocommerce

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includes/class-wc-install.php

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<?php
/**
 * Installation related functions and actions.
 *
 * @package WooCommerce\Classes
 * @version 3.0.0
 */

use Automattic\Jetpack\Constants;
use Automattic\WooCommerce\Internal\WCCom\ConnectionHelper as WCConnectionHelper;

defined( 'ABSPATH' ) || exit;

/**
 * WC_Install Class.
 */
class WC_Install {

    /**
     * DB updates and callbacks that need to be run per version.
     *
     * @var array
     */
    private static $db_updates = array(
        '2.0.0' => array(
            'wc_update_200_file_paths',
            'wc_update_200_permalinks',
            'wc_update_200_subcat_display',
            'wc_update_200_taxrates',
            'wc_update_200_line_items',
            'wc_update_200_images',
            'wc_update_200_db_version',
        ),
        '2.0.9' => array(
            'wc_update_209_brazillian_state',
            'wc_update_209_db_version',
        ),
        '2.1.0' => array(
            'wc_update_210_remove_pages',
            'wc_update_210_file_paths',
            'wc_update_210_db_version',
        ),
        '2.2.0' => array(
            'wc_update_220_shipping',
            'wc_update_220_order_status',
            'wc_update_220_variations',
            'wc_update_220_attributes',
            'wc_update_220_db_version',
        ),
        '2.3.0' => array(
            'wc_update_230_options',
            'wc_update_230_db_version',
        ),
        '2.4.0' => array(
            'wc_update_240_options',
            'wc_update_240_shipping_methods',
            'wc_update_240_api_keys',
            'wc_update_240_refunds',
            'wc_update_240_db_version',
        ),
        '2.4.1' => array(
            'wc_update_241_variations',
            'wc_update_241_db_version',
        ),
        '2.5.0' => array(
            'wc_update_250_currency',
            'wc_update_250_db_version',
        ),
        '2.6.0' => array(
            'wc_update_260_options',
            'wc_update_260_termmeta',
            'wc_update_260_zones',
            'wc_update_260_zone_methods',
            'wc_update_260_refunds',
            'wc_update_260_db_version',
        ),
        '3.0.0' => array(
            'wc_update_300_grouped_products',
            'wc_update_300_settings',
            'wc_update_300_product_visibility',
            'wc_update_300_db_version',
        ),
        '3.1.0' => array(
            'wc_update_310_downloadable_products',
            'wc_update_310_old_comments',
            'wc_update_310_db_version',
        ),
        '3.1.2' => array(
            'wc_update_312_shop_manager_capabilities',
            'wc_update_312_db_version',
        ),
        '3.2.0' => array(
            'wc_update_320_mexican_states',
            'wc_update_320_db_version',
        ),
        '3.3.0' => array(
            'wc_update_330_image_options',
            'wc_update_330_webhooks',
            'wc_update_330_product_stock_status',
            'wc_update_330_set_default_product_cat',
            'wc_update_330_clear_transients',
            'wc_update_330_set_paypal_sandbox_credentials',
            'wc_update_330_db_version',
        ),
        '3.4.0' => array(
            'wc_update_340_states',
            'wc_update_340_state',
            'wc_update_340_last_active',
            'wc_update_340_db_version',
        ),
        '3.4.3' => array(
            'wc_update_343_cleanup_foreign_keys',
            'wc_update_343_db_version',
        ),
        '3.4.4' => array(
            'wc_update_344_recreate_roles',
            'wc_update_344_db_version',
        ),
        '3.5.0' => array(
            'wc_update_350_reviews_comment_type',
            'wc_update_350_db_version',
        ),
        '3.5.2' => array(
            'wc_update_352_drop_download_log_fk',
        ),
        '3.5.4' => array(
            'wc_update_354_modify_shop_manager_caps',
            'wc_update_354_db_version',
        ),
        '3.6.0' => array(
            'wc_update_360_product_lookup_tables',
            'wc_update_360_term_meta',
            'wc_update_360_downloadable_product_permissions_index',
            'wc_update_360_db_version',
        ),
        '3.7.0' => array(
            'wc_update_370_tax_rate_classes',
            'wc_update_370_mro_std_currency',
            'wc_update_370_db_version',
        ),
        '3.9.0' => array(
            'wc_update_390_move_maxmind_database',
            'wc_update_390_change_geolocation_database_update_cron',
            'wc_update_390_db_version',
        ),
        '4.0.0' => array(
            'wc_update_product_lookup_tables',
            'wc_update_400_increase_size_of_column',
            'wc_update_400_reset_action_scheduler_migration_status',
            'wc_update_400_db_version',
        ),
        '4.4.0' => array(
            'wc_update_440_insert_attribute_terms_for_variable_products',
            'wc_update_440_db_version',
        ),
        '4.5.0' => array(
            'wc_update_450_sanitize_coupons_code',
            'wc_update_450_db_version',
        ),
        '5.0.0' => array(
            'wc_update_500_fix_product_review_count',
            'wc_update_500_db_version',
        ),
    );

    /**
     * Hook in tabs.
     */
    public static function init() {
        add_action( 'init', array( __CLASS__, 'check_version' ), 5 );
        add_action( 'init', array( __CLASS__, 'manual_database_update' ), 20 );
        add_action( 'admin_init', array( __CLASS__, 'wc_admin_db_update_notice' ) );
        add_action( 'woocommerce_run_update_callback', array( __CLASS__, 'run_update_callback' ) );
        add_action( 'admin_init', array( __CLASS__, 'install_actions' ) );
        add_filter( 'plugin_action_links_' . WC_PLUGIN_BASENAME, array( __CLASS__, 'plugin_action_links' ) );
        add_filter( 'plugin_row_meta', array( __CLASS__, 'plugin_row_meta' ), 10, 2 );
        add_filter( 'wpmu_drop_tables', array( __CLASS__, 'wpmu_drop_tables' ) );
        add_filter( 'cron_schedules', array( __CLASS__, 'cron_schedules' ) );
    }

    /**
     * Check WooCommerce version and run the updater is required.
     *
     * This check is done on all requests and runs if the versions do not match.
     */
    public static function check_version() {
        if ( ! Constants::is_defined( 'IFRAME_REQUEST' ) && version_compare( get_option( 'woocommerce_version' ), WC()->version, '<' ) ) {
            self::install();
            do_action( 'woocommerce_updated' );
        }
    }

    /**
     * Performan manual database update when triggered by WooCommerce System Tools.
     *
     * @since 3.6.5
     */
    public static function manual_database_update() {
        $blog_id = get_current_blog_id();

        add_action( 'wp_' . $blog_id . '_wc_updater_cron', array( __CLASS__, 'run_manual_database_update' ) );
    }

    /**
     * Add WC Admin based db update notice.
     *
     * @since 4.0.0
     */
    public static function wc_admin_db_update_notice() {
        if (
            WC()->is_wc_admin_active() &&
            false !== get_option( 'woocommerce_admin_install_timestamp' )
        ) {
            new WC_Notes_Run_Db_Update();
        }
    }

    /**
     * Run manual database update.
     */
    public static function run_manual_database_update() {
        self::update();
    }

    /**
     * Run an update callback when triggered by ActionScheduler.
     *
     * @param string $update_callback Callback name.
     *
     * @since 3.6.0
     */
    public static function run_update_callback( $update_callback ) {
        include_once dirname( __FILE__ ) . '/wc-update-functions.php';

        if ( is_callable( $update_callback ) ) {
            self::run_update_callback_start( $update_callback );
            $result = (bool) call_user_func( $update_callback );
            self::run_update_callback_end( $update_callback, $result );
        }
    }

    /**
     * Triggered when a callback will run.
     *
     * @since 3.6.0
     * @param string $callback Callback name.
     */
    protected static function run_update_callback_start( $callback ) {
        wc_maybe_define_constant( 'WC_UPDATING', true );
    }

    /**
     * Triggered when a callback has ran.
     *
     * @since 3.6.0
     * @param string $callback Callback name.
     * @param bool   $result Return value from callback. Non-false need to run again.
     */
    protected static function run_update_callback_end( $callback, $result ) {
        if ( $result ) {
            WC()->queue()->add(
                'woocommerce_run_update_callback',
                array(
                    'update_callback' => $callback,
                ),
                'woocommerce-db-updates'
            );
        }
    }

    /**
     * Install actions when a update button is clicked within the admin area.
     *
     * This function is hooked into admin_init to affect admin only.
     */
    public static function install_actions() {
        if ( ! empty( $_GET['do_update_woocommerce'] ) ) { // WPCS: input var ok.
            check_admin_referer( 'wc_db_update', 'wc_db_update_nonce' );
            self::update();
            WC_Admin_Notices::add_notice( 'update', true );
        }
    }

    /**
     * Install WC.
     */
    public static function install() {
        if ( ! is_blog_installed() ) {
            return;
        }

        // Check if we are not already running this routine.
        if ( 'yes' === get_transient( 'wc_installing' ) ) {
            return;
        }

        // If we made it till here nothing is running yet, lets set the transient now.
        set_transient( 'wc_installing', 'yes', MINUTE_IN_SECONDS * 10 );
        wc_maybe_define_constant( 'WC_INSTALLING', true );

        WC()->wpdb_table_fix();
        self::remove_admin_notices();
        self::create_tables();
        self::verify_base_tables();
        self::create_options();
        self::create_roles();
        self::setup_environment();
        self::create_terms();
        self::create_cron_jobs();
        self::create_files();
        self::maybe_create_pages();
        self::maybe_set_activation_transients();
        self::update_wc_version();
        self::maybe_update_db_version();

        delete_transient( 'wc_installing' );

        do_action( 'woocommerce_flush_rewrite_rules' );
        do_action( 'woocommerce_installed' );
    }

    /**
     * Check if all the base tables are present.
     *
     * @param bool $modify_notice Whether to modify notice based on if all tables are present.
     * @param bool $execute       Whether to execute get_schema queries as well.
     *
     * @return array List of querues.
     */
    public static function verify_base_tables( $modify_notice = true, $execute = false ) {
        require_once ABSPATH . 'wp-admin/includes/upgrade.php';

        if ( $execute ) {
            self::create_tables();
        }
        $queries        = dbDelta( self::get_schema(), false );
        $missing_tables = array();
        foreach ( $queries as $table_name => $result ) {
            if ( "Created table $table_name" === $result ) {
                $missing_tables[] = $table_name;
            }
        }

        if ( 0 < count( $missing_tables ) ) {
            if ( $modify_notice ) {
                WC_Admin_Notices::add_notice( 'base_tables_missing' );
            }
            update_option( 'woocommerce_schema_missing_tables', $missing_tables );
        } else {
            if ( $modify_notice ) {
                WC_Admin_Notices::remove_notice( 'base_tables_missing' );
            }
            update_option( 'woocommerce_schema_version', WC()->db_version );
            delete_option( 'woocommerce_schema_missing_tables' );
        }
        return $missing_tables;
    }

    /**
     * Reset any notices added to admin.
     *
     * @since 3.2.0
     */
    private static function remove_admin_notices() {
        include_once dirname( __FILE__ ) . '/admin/class-wc-admin-notices.php';
        WC_Admin_Notices::remove_all_notices();
    }

    /**
     * Setup WC environment - post types, taxonomies, endpoints.
     *
     * @since 3.2.0
     */
    private static function setup_environment() {
        WC_Post_types::register_post_types();
        WC_Post_types::register_taxonomies();
        WC()->query->init_query_vars();
        WC()->query->add_endpoints();
        WC_API::add_endpoint();
        WC_Auth::add_endpoint();
    }

    /**
     * Is this a brand new WC install?
     *
     * A brand new install has no version yet. Also treat empty installs as 'new'.
     *
     * @since  3.2.0
     * @return boolean
     */
    public static function is_new_install() {
        $product_count = array_sum( (array) wp_count_posts( 'product' ) );

        return is_null( get_option( 'woocommerce_version', null ) ) || ( 0 === $product_count && -1 === wc_get_page_id( 'shop' ) );
    }

    /**
     * Is a DB update needed?
     *
     * @since  3.2.0
     * @return boolean
     */
    public static function needs_db_update() {
        $current_db_version = get_option( 'woocommerce_db_version', null );
        $updates            = self::get_db_update_callbacks();
        $update_versions    = array_keys( $updates );
        usort( $update_versions, 'version_compare' );

        return ! is_null( $current_db_version ) && version_compare( $current_db_version, end( $update_versions ), '<' );
    }

    /**
     * See if we need to set redirect transients for activation or not.
     *
     * @since 4.6.0
     */
    private static function maybe_set_activation_transients() {
        if ( self::is_new_install() ) {
            set_transient( '_wc_activation_redirect', 1, 30 );
        }
    }

    /**
     * See if we need to show or run database updates during install.
     *
     * @since 3.2.0
     */
    private static function maybe_update_db_version() {
        if ( self::needs_db_update() ) {
            if ( apply_filters( 'woocommerce_enable_auto_update_db', false ) ) {
                self::update();
            } else {
                WC_Admin_Notices::add_notice( 'update', true );
            }
        } else {
            self::update_db_version();
        }
    }

    /**
     * Update WC version to current.
     */
    private static function update_wc_version() {
        update_option( 'woocommerce_version', WC()->version );
    }

    /**
     * Get list of DB update callbacks.
     *
     * @since  3.0.0
     * @return array
     */
    public static function get_db_update_callbacks() {
        return self::$db_updates;
    }

    /**
     * Push all needed DB updates to the queue for processing.
     */
    private static function update() {
        $current_db_version = get_option( 'woocommerce_db_version' );
        $loop               = 0;

        foreach ( self::get_db_update_callbacks() as $version => $update_callbacks ) {
            if ( version_compare( $current_db_version, $version, '<' ) ) {
                foreach ( $update_callbacks as $update_callback ) {
                    WC()->queue()->schedule_single(
                        time() + $loop,
                        'woocommerce_run_update_callback',
                        array(
                            'update_callback' => $update_callback,
                        ),
                        'woocommerce-db-updates'
                    );
                    $loop++;
                }
            }
        }
    }

    /**
     * Update DB version to current.
     *
     * @param string|null $version New WooCommerce DB version or null.
     */
    public static function update_db_version( $version = null ) {
        update_option( 'woocommerce_db_version', is_null( $version ) ? WC()->version : $version );
    }

    /**
     * Add more cron schedules.
     *
     * @param array $schedules List of WP scheduled cron jobs.
     *
     * @return array
     */
    public static function cron_schedules( $schedules ) {
        $schedules['monthly']     = array(
            'interval' => 2635200,
            'display'  => __( 'Monthly', 'woocommerce' ),
        );
        $schedules['fifteendays'] = array(
            'interval' => 1296000,
            'display'  => __( 'Every 15 Days', 'woocommerce' ),
        );
        return $schedules;
    }

    /**
     * Create cron jobs (clear them first).
     */
    private static function create_cron_jobs() {
        wp_clear_scheduled_hook( 'woocommerce_scheduled_sales' );
        wp_clear_scheduled_hook( 'woocommerce_cancel_unpaid_orders' );
        wp_clear_scheduled_hook( 'woocommerce_cleanup_sessions' );
        wp_clear_scheduled_hook( 'woocommerce_cleanup_personal_data' );
        wp_clear_scheduled_hook( 'woocommerce_cleanup_logs' );
        wp_clear_scheduled_hook( 'woocommerce_geoip_updater' );
        wp_clear_scheduled_hook( 'woocommerce_tracker_send_event' );

        $ve = get_option( 'gmt_offset' ) > 0 ? '-' : '+';

        wp_schedule_event( strtotime( '00:00 tomorrow ' . $ve . absint( get_option( 'gmt_offset' ) ) . ' HOURS' ), 'daily', 'woocommerce_scheduled_sales' );

        $held_duration = get_option( 'woocommerce_hold_stock_minutes', '60' );

        if ( '' !== $held_duration ) {
            $cancel_unpaid_interval = apply_filters( 'woocommerce_cancel_unpaid_orders_interval_minutes', absint( $held_duration ) );
            wp_schedule_single_event( time() + ( absint( $cancel_unpaid_interval ) * 60 ), 'woocommerce_cancel_unpaid_orders' );
        }

        // Delay the first run of `woocommerce_cleanup_personal_data` by 10 seconds
        // so it doesn't occur in the same request. WooCommerce Admin also schedules
        // a daily cron that gets lost due to a race condition. WC_Privacy's background
        // processing instance updates the cron schedule from within a cron job.
        wp_schedule_event( time() + 10, 'daily', 'woocommerce_cleanup_personal_data' );
        wp_schedule_event( time() + ( 3 * HOUR_IN_SECONDS ), 'daily', 'woocommerce_cleanup_logs' );
        wp_schedule_event( time() + ( 6 * HOUR_IN_SECONDS ), 'twicedaily', 'woocommerce_cleanup_sessions' );
        wp_schedule_event( time() + MINUTE_IN_SECONDS, 'fifteendays', 'woocommerce_geoip_updater' );
        wp_schedule_event( time() + 10, apply_filters( 'woocommerce_tracker_event_recurrence', 'daily' ), 'woocommerce_tracker_send_event' );
    }

    /**
     * Create pages on installation.
     */
    public static function maybe_create_pages() {
        if ( empty( get_option( 'woocommerce_db_version' ) ) ) {
            self::create_pages();
        }
    }

    /**
     * Create pages that the plugin relies on, storing page IDs in variables.
     */
    public static function create_pages() {
        include_once dirname( __FILE__ ) . '/admin/wc-admin-functions.php';

        $pages = apply_filters(
            'woocommerce_create_pages',
            array(
                'shop'      => array(
                    'name'    => _x( 'shop', 'Page slug', 'woocommerce' ),
                    'title'   => _x( 'Shop', 'Page title', 'woocommerce' ),
                    'content' => '',
                ),
                'cart'      => array(
                    'name'    => _x( 'cart', 'Page slug', 'woocommerce' ),
                    'title'   => _x( 'Cart', 'Page title', 'woocommerce' ),
                    'content' => '<!-- wp:shortcode -->[' . apply_filters( 'woocommerce_cart_shortcode_tag', 'woocommerce_cart' ) . ']<!-- /wp:shortcode -->',
                ),
                'checkout'  => array(
                    'name'    => _x( 'checkout', 'Page slug', 'woocommerce' ),
                    'title'   => _x( 'Checkout', 'Page title', 'woocommerce' ),
                    'content' => '<!-- wp:shortcode -->[' . apply_filters( 'woocommerce_checkout_shortcode_tag', 'woocommerce_checkout' ) . ']<!-- /wp:shortcode -->',
                ),
                'myaccount' => array(
                    'name'    => _x( 'my-account', 'Page slug', 'woocommerce' ),
                    'title'   => _x( 'My account', 'Page title', 'woocommerce' ),
                    'content' => '<!-- wp:shortcode -->[' . apply_filters( 'woocommerce_my_account_shortcode_tag', 'woocommerce_my_account' ) . ']<!-- /wp:shortcode -->',
                ),
            )
        );

        foreach ( $pages as $key => $page ) {
            wc_create_page( esc_sql( $page['name'] ), 'woocommerce_' . $key . '_page_id', $page['title'], $page['content'], ! empty( $page['parent'] ) ? wc_get_page_id( $page['parent'] ) : '' );
        }
    }

    /**
     * Default options.
     *
     * Sets up the default options used on the settings page.
     */
    private static function create_options() {
        // Include settings so that we can run through defaults.
        include_once dirname( __FILE__ ) . '/admin/class-wc-admin-settings.php';

        $settings = WC_Admin_Settings::get_settings_pages();

        foreach ( $settings as $section ) {
            if ( ! method_exists( $section, 'get_settings' ) ) {
                continue;
            }
            $subsections = array_unique( array_merge( array( '' ), array_keys( $section->get_sections() ) ) );

            foreach ( $subsections as $subsection ) {
                foreach ( $section->get_settings( $subsection ) as $value ) {
                    if ( isset( $value['default'] ) && isset( $value['id'] ) ) {
                        $autoload = isset( $value['autoload'] ) ? (bool) $value['autoload'] : true;
                        add_option( $value['id'], $value['default'], '', ( $autoload ? 'yes' : 'no' ) );
                    }
                }
            }
        }

        // Define other defaults if not in setting screens.
        add_option( 'woocommerce_single_image_width', '600', '', 'yes' );
        add_option( 'woocommerce_thumbnail_image_width', '300', '', 'yes' );
        add_option( 'woocommerce_checkout_highlight_required_fields', 'yes', '', 'yes' );
        add_option( 'woocommerce_demo_store', 'no', '', 'no' );

        // Define initial tax classes.
        WC_Tax::create_tax_class( __( 'Reduced rate', 'woocommerce' ) );
        WC_Tax::create_tax_class( __( 'Zero rate', 'woocommerce' ) );
    }

    /**
     * Add the default terms for WC taxonomies - product types and order statuses. Modify this at your own risk.
     */
    public static function create_terms() {
        $taxonomies = array(
            'product_type'       => array(
                'simple',
                'grouped',
                'variable',
                'external',
            ),
            'product_visibility' => array(
                'exclude-from-search',
                'exclude-from-catalog',
                'featured',
                'outofstock',
                'rated-1',
                'rated-2',
                'rated-3',
                'rated-4',
                'rated-5',
            ),
        );

        foreach ( $taxonomies as $taxonomy => $terms ) {
            foreach ( $terms as $term ) {
                if ( ! get_term_by( 'name', $term, $taxonomy ) ) { // @codingStandardsIgnoreLine.
                    wp_insert_term( $term, $taxonomy );
                }
            }
        }

        $woocommerce_default_category = (int) get_option( 'default_product_cat', 0 );

        if ( ! $woocommerce_default_category || ! term_exists( $woocommerce_default_category, 'product_cat' ) ) {
            $default_product_cat_id   = 0;
            $default_product_cat_slug = sanitize_title( _x( 'Uncategorized', 'Default category slug', 'woocommerce' ) );
            $default_product_cat      = get_term_by( 'slug', $default_product_cat_slug, 'product_cat' ); // @codingStandardsIgnoreLine.

            if ( $default_product_cat ) {
                $default_product_cat_id = absint( $default_product_cat->term_taxonomy_id );
            } else {
                $result = wp_insert_term( _x( 'Uncategorized', 'Default category slug', 'woocommerce' ), 'product_cat', array( 'slug' => $default_product_cat_slug ) );

                if ( ! is_wp_error( $result ) && ! empty( $result['term_taxonomy_id'] ) ) {
                    $default_product_cat_id = absint( $result['term_taxonomy_id'] );
                }
            }

            if ( $default_product_cat_id ) {
                update_option( 'default_product_cat', $default_product_cat_id );
            }
        }
    }

    /**
     * Set up the database tables which the plugin needs to function.
     * WARNING: If you are modifying this method, make sure that its safe to call regardless of the state of database.
     *
     * This is called from `install` method and is executed in-sync when WC is installed or updated. This can also be called optionally from `verify_base_tables`.
     *
     * TODO: Add all crucial tables that we have created from workers in the past.
     *
     * Tables:
     *      woocommerce_attribute_taxonomies - Table for storing attribute taxonomies - these are user defined
     *      woocommerce_downloadable_product_permissions - Table for storing user and guest download permissions.
     *          KEY(order_id, product_id, download_id) used for organizing downloads on the My Account page
     *      woocommerce_order_items - Order line items are stored in a table to make them easily queryable for reports
     *      woocommerce_order_itemmeta - Order line item meta is stored in a table for storing extra data.
     *      woocommerce_tax_rates - Tax Rates are stored inside 2 tables making tax queries simple and efficient.
     *      woocommerce_tax_rate_locations - Each rate can be applied to more than one postcode/city hence the second table.
     */
    private static function create_tables() {
        global $wpdb;

        $wpdb->hide_errors();

        require_once ABSPATH . 'wp-admin/includes/upgrade.php';

        /**
         * Before updating with DBDELTA, remove any primary keys which could be
         * modified due to schema updates.
         */
        if ( $wpdb->get_var( "SHOW TABLES LIKE '{$wpdb->prefix}woocommerce_downloadable_product_permissions';" ) ) {
            if ( ! $wpdb->get_var( "SHOW COLUMNS FROM `{$wpdb->prefix}woocommerce_downloadable_product_permissions` LIKE 'permission_id';" ) ) {
                $wpdb->query( "ALTER TABLE {$wpdb->prefix}woocommerce_downloadable_product_permissions DROP PRIMARY KEY, ADD `permission_id` BIGINT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT;" );
            }
        }

        /**
         * Change wp_woocommerce_sessions schema to use a bigint auto increment field instead of char(32) field as
         * the primary key as it is not a good practice to use a char(32) field as the primary key of a table and as
         * there were reports of issues with this table (see https://github.com/woocommerce/woocommerce/issues/20912).
         *
         * This query needs to run before dbDelta() as this WP function is not able to handle primary key changes
         * (see https://github.com/woocommerce/woocommerce/issues/21534 and https://core.trac.wordpress.org/ticket/40357).
         */
        if ( $wpdb->get_var( "SHOW TABLES LIKE '{$wpdb->prefix}woocommerce_sessions'" ) ) {
            if ( ! $wpdb->get_var( "SHOW KEYS FROM {$wpdb->prefix}woocommerce_sessions WHERE Key_name = 'PRIMARY' AND Column_name = 'session_id'" ) ) {
                $wpdb->query(
                    "ALTER TABLE `{$wpdb->prefix}woocommerce_sessions` DROP PRIMARY KEY, DROP KEY `session_id`, ADD PRIMARY KEY(`session_id`), ADD UNIQUE KEY(`session_key`)"
                );
            }
        }

        dbDelta( self::get_schema() );

        $index_exists = $wpdb->get_row( "SHOW INDEX FROM {$wpdb->comments} WHERE column_name = 'comment_type' and key_name = 'woo_idx_comment_type'" );

        if ( is_null( $index_exists ) ) {
            // Add an index to the field comment_type to improve the response time of the query
            // used by WC_Comments::wp_count_comments() to get the number of comments by type.
            $wpdb->query( "ALTER TABLE {$wpdb->comments} ADD INDEX woo_idx_comment_type (comment_type)" );
        }

        // Get tables data types and check it matches before adding constraint.
        $download_log_columns     = $wpdb->get_results( "SHOW COLUMNS FROM {$wpdb->prefix}wc_download_log WHERE Field = 'permission_id'", ARRAY_A );
        $download_log_column_type = '';
        if ( isset( $download_log_columns[0]['Type'] ) ) {
            $download_log_column_type = $download_log_columns[0]['Type'];
        }

        $download_permissions_columns     = $wpdb->get_results( "SHOW COLUMNS FROM {$wpdb->prefix}woocommerce_downloadable_product_permissions WHERE Field = 'permission_id'", ARRAY_A );
        $download_permissions_column_type = '';
        if ( isset( $download_permissions_columns[0]['Type'] ) ) {
            $download_permissions_column_type = $download_permissions_columns[0]['Type'];
        }

        // Add constraint to download logs if the columns matches.
        if ( ! empty( $download_permissions_column_type ) && ! empty( $download_log_column_type ) && $download_permissions_column_type === $download_log_column_type ) {
            $fk_result = $wpdb->get_row( "SHOW CREATE TABLE {$wpdb->prefix}wc_download_log" );
            if ( false === strpos( $fk_result->{'Create Table'}, "fk_{$wpdb->prefix}wc_download_log_permission_id" ) ) {
                $wpdb->query(
                    "ALTER TABLE `{$wpdb->prefix}wc_download_log`
                    ADD CONSTRAINT `fk_{$wpdb->prefix}wc_download_log_permission_id`
                    FOREIGN KEY (`permission_id`)
                    REFERENCES `{$wpdb->prefix}woocommerce_downloadable_product_permissions` (`permission_id`) ON DELETE CASCADE;"
                );
            }
        }

        // Clear table caches.
        delete_transient( 'wc_attribute_taxonomies' );
    }

    /**
     * Get Table schema.
     *
     * See https://github.com/woocommerce/woocommerce/wiki/Database-Description/
     *
     * A note on indexes; Indexes have a maximum size of 767 bytes. Historically, we haven't need to be concerned about that.
     * As of WordPress 4.2, however, we moved to utf8mb4, which uses 4 bytes per character. This means that an index which
     * used to have room for floor(767/3) = 255 characters, now only has room for floor(767/4) = 191 characters.
     *
     * Changing indexes may cause duplicate index notices in logs due to https://core.trac.wordpress.org/ticket/34870 but dropping
     * indexes first causes too much load on some servers/larger DB.
     *
     * When adding or removing a table, make sure to update the list of tables in WC_Install::get_tables().
     *
     * @return string
     */
    private static function get_schema() {
        global $wpdb;

        $collate = '';

        if ( $wpdb->has_cap( 'collation' ) ) {
            $collate = $wpdb->get_charset_collate();
        }

        /*
         * Indexes have a maximum size of 767 bytes. Historically, we haven't need to be concerned about that.
         * As of WP 4.2, however, they moved to utf8mb4, which uses 4 bytes per character. This means that an index which
         * used to have room for floor(767/3) = 255 characters, now only has room for floor(767/4) = 191 characters.
         */
        $max_index_length = 191;

        $tables = "
CREATE TABLE {$wpdb->prefix}woocommerce_sessions (
  session_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  session_key char(32) NOT NULL,
  session_value longtext NOT NULL,
  session_expiry BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY  (session_id),
  UNIQUE KEY session_key (session_key)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_api_keys (
  key_id BIGINT UNSIGNED NOT NULL auto_increment,
  user_id BIGINT UNSIGNED NOT NULL,
  description varchar(200) NULL,
  permissions varchar(10) NOT NULL,
  consumer_key char(64) NOT NULL,
  consumer_secret char(43) NOT NULL,
  nonces longtext NULL,
  truncated_key char(7) NOT NULL,
  last_access datetime NULL default null,
  PRIMARY KEY  (key_id),
  KEY consumer_key (consumer_key),
  KEY consumer_secret (consumer_secret)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_attribute_taxonomies (
  attribute_id BIGINT UNSIGNED NOT NULL auto_increment,
  attribute_name varchar(200) NOT NULL,
  attribute_label varchar(200) NULL,
  attribute_type varchar(20) NOT NULL,
  attribute_orderby varchar(20) NOT NULL,
  attribute_public int(1) NOT NULL DEFAULT 1,
  PRIMARY KEY  (attribute_id),
  KEY attribute_name (attribute_name(20))
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_downloadable_product_permissions (
  permission_id BIGINT UNSIGNED NOT NULL auto_increment,
  download_id varchar(36) NOT NULL,
  product_id BIGINT UNSIGNED NOT NULL,
  order_id BIGINT UNSIGNED NOT NULL DEFAULT 0,
  order_key varchar(200) NOT NULL,
  user_email varchar(200) NOT NULL,
  user_id BIGINT UNSIGNED NULL,
  downloads_remaining varchar(9) NULL,
  access_granted datetime NOT NULL default '0000-00-00 00:00:00',
  access_expires datetime NULL default null,
  download_count BIGINT UNSIGNED NOT NULL DEFAULT 0,
  PRIMARY KEY  (permission_id),
  KEY download_order_key_product (product_id,order_id,order_key(16),download_id),
  KEY download_order_product (download_id,order_id,product_id),
  KEY order_id (order_id),
  KEY user_order_remaining_expires (user_id,order_id,downloads_remaining,access_expires)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_order_items (
  order_item_id BIGINT UNSIGNED NOT NULL auto_increment,
  order_item_name TEXT NOT NULL,
  order_item_type varchar(200) NOT NULL DEFAULT '',
  order_id BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY  (order_item_id),
  KEY order_id (order_id)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_order_itemmeta (
  meta_id BIGINT UNSIGNED NOT NULL auto_increment,
  order_item_id BIGINT UNSIGNED NOT NULL,
  meta_key varchar(255) default NULL,
  meta_value longtext NULL,
  PRIMARY KEY  (meta_id),
  KEY order_item_id (order_item_id),
  KEY meta_key (meta_key(32))
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_tax_rates (
  tax_rate_id BIGINT UNSIGNED NOT NULL auto_increment,
  tax_rate_country varchar(2) NOT NULL DEFAULT '',
  tax_rate_state varchar(200) NOT NULL DEFAULT '',
  tax_rate varchar(8) NOT NULL DEFAULT '',
  tax_rate_name varchar(200) NOT NULL DEFAULT '',
  tax_rate_priority BIGINT UNSIGNED NOT NULL,
  tax_rate_compound int(1) NOT NULL DEFAULT 0,
  tax_rate_shipping int(1) NOT NULL DEFAULT 1,
  tax_rate_order BIGINT UNSIGNED NOT NULL,
  tax_rate_class varchar(200) NOT NULL DEFAULT '',
  PRIMARY KEY  (tax_rate_id),
  KEY tax_rate_country (tax_rate_country),
  KEY tax_rate_state (tax_rate_state(2)),
  KEY tax_rate_class (tax_rate_class(10)),
  KEY tax_rate_priority (tax_rate_priority)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_tax_rate_locations (
  location_id BIGINT UNSIGNED NOT NULL auto_increment,
  location_code varchar(200) NOT NULL,
  tax_rate_id BIGINT UNSIGNED NOT NULL,
  location_type varchar(40) NOT NULL,
  PRIMARY KEY  (location_id),
  KEY tax_rate_id (tax_rate_id),
  KEY location_type_code (location_type(10),location_code(20))
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_zones (
  zone_id BIGINT UNSIGNED NOT NULL auto_increment,
  zone_name varchar(200) NOT NULL,
  zone_order BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY  (zone_id)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_zone_locations (
  location_id BIGINT UNSIGNED NOT NULL auto_increment,
  zone_id BIGINT UNSIGNED NOT NULL,
  location_code varchar(200) NOT NULL,
  location_type varchar(40) NOT NULL,
  PRIMARY KEY  (location_id),
  KEY location_id (location_id),
  KEY location_type_code (location_type(10),location_code(20))
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_zone_methods (
  zone_id BIGINT UNSIGNED NOT NULL,
  instance_id BIGINT UNSIGNED NOT NULL auto_increment,
  method_id varchar(200) NOT NULL,
  method_order BIGINT UNSIGNED NOT NULL,
  is_enabled tinyint(1) NOT NULL DEFAULT '1',
  PRIMARY KEY  (instance_id)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_payment_tokens (
  token_id BIGINT UNSIGNED NOT NULL auto_increment,
  gateway_id varchar(200) NOT NULL,
  token text NOT NULL,
  user_id BIGINT UNSIGNED NOT NULL DEFAULT '0',
  type varchar(200) NOT NULL,
  is_default tinyint(1) NOT NULL DEFAULT '0',
  PRIMARY KEY  (token_id),
  KEY user_id (user_id)
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_payment_tokenmeta (
  meta_id BIGINT UNSIGNED NOT NULL auto_increment,
  payment_token_id BIGINT UNSIGNED NOT NULL,
  meta_key varchar(255) NULL,
  meta_value longtext NULL,
  PRIMARY KEY  (meta_id),
  KEY payment_token_id (payment_token_id),
  KEY meta_key (meta_key(32))
) $collate;
CREATE TABLE {$wpdb->prefix}woocommerce_log (
  log_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  timestamp datetime NOT NULL,
  level smallint(4) NOT NULL,
  source varchar(200) NOT NULL,
  message longtext NOT NULL,
  context longtext NULL,
  PRIMARY KEY (log_id),
  KEY level (level)
) $collate;
CREATE TABLE {$wpdb->prefix}wc_webhooks (
  webhook_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  status varchar(200) NOT NULL,
  name text NOT NULL,
  user_id BIGINT UNSIGNED NOT NULL,
  delivery_url text NOT NULL,
  secret text NOT NULL,
  topic varchar(200) NOT NULL,
  date_created datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  date_created_gmt datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  date_modified datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  date_modified_gmt datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  api_version smallint(4) NOT NULL,
  failure_count smallint(10) NOT NULL DEFAULT '0',
  pending_delivery tinyint(1) NOT NULL DEFAULT '0',
  PRIMARY KEY  (webhook_id),
  KEY user_id (user_id)
) $collate;
CREATE TABLE {$wpdb->prefix}wc_download_log (
  download_log_id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  timestamp datetime NOT NULL,
  permission_id BIGINT UNSIGNED NOT NULL,
  user_id BIGINT UNSIGNED NULL,
  user_ip_address VARCHAR(100) NULL DEFAULT '',
  PRIMARY KEY  (download_log_id),
  KEY permission_id (permission_id),
  KEY timestamp (timestamp)
) $collate;
CREATE TABLE {$wpdb->prefix}wc_product_meta_lookup (
  `product_id` bigint(20) NOT NULL,
  `sku` varchar(100) NULL default '',
  `virtual` tinyint(1) NULL default 0,
  `downloadable` tinyint(1) NULL default 0,
  `min_price` decimal(19,4) NULL default NULL,
  `max_price` decimal(19,4) NULL default NULL,
  `onsale` tinyint(1) NULL default 0,
  `stock_quantity` double NULL default NULL,
  `stock_status` varchar(100) NULL default 'instock',
  `rating_count` bigint(20) NULL default 0,
  `average_rating` decimal(3,2) NULL default 0.00,
  `total_sales` bigint(20) NULL default 0,
  `tax_status` varchar(100) NULL default 'taxable',
  `tax_class` varchar(100) NULL default '',
  PRIMARY KEY  (`product_id`),
  KEY `virtual` (`virtual`),
  KEY `downloadable` (`downloadable`),
  KEY `stock_status` (`stock_status`),
  KEY `stock_quantity` (`stock_quantity`),
  KEY `onsale` (`onsale`),
  KEY min_max_price (`min_price`, `max_price`)
) $collate;
CREATE TABLE {$wpdb->prefix}wc_tax_rate_classes (
  tax_rate_class_id BIGINT UNSIGNED NOT NULL auto_increment,
  name varchar(200) NOT NULL DEFAULT '',
  slug varchar(200) NOT NULL DEFAULT '',
  PRIMARY KEY  (tax_rate_class_id),
  UNIQUE KEY slug (slug($max_index_length))
) $collate;
CREATE TABLE {$wpdb->prefix}wc_reserved_stock (
    `order_id` bigint(20) NOT NULL,
    `product_id` bigint(20) NOT NULL,
    `stock_quantity` double NOT NULL DEFAULT 0,
    `timestamp` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
    `expires` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
    PRIMARY KEY  (`order_id`, `product_id`)
) $collate;
        ";

        return $tables;
    }

    /**
     * Return a list of WooCommerce tables. Used to make sure all WC tables are dropped when uninstalling the plugin
     * in a single site or multi site environment.
     *
     * @return array WC tables.
     */
    public static function get_tables() {
        global $wpdb;

        $tables = array(
            "{$wpdb->prefix}wc_download_log",
            "{$wpdb->prefix}wc_product_meta_lookup",
            "{$wpdb->prefix}wc_tax_rate_classes",
            "{$wpdb->prefix}wc_webhooks",
            "{$wpdb->prefix}woocommerce_api_keys",
            "{$wpdb->prefix}woocommerce_attribute_taxonomies",
            "{$wpdb->prefix}woocommerce_downloadable_product_permissions",
            "{$wpdb->prefix}woocommerce_log",
            "{$wpdb->prefix}woocommerce_order_itemmeta",
            "{$wpdb->prefix}woocommerce_order_items",
            "{$wpdb->prefix}woocommerce_payment_tokenmeta",
            "{$wpdb->prefix}woocommerce_payment_tokens",
            "{$wpdb->prefix}woocommerce_sessions",
            "{$wpdb->prefix}woocommerce_shipping_zone_locations",
            "{$wpdb->prefix}woocommerce_shipping_zone_methods",
            "{$wpdb->prefix}woocommerce_shipping_zones",
            "{$wpdb->prefix}woocommerce_tax_rate_locations",
            "{$wpdb->prefix}woocommerce_tax_rates",
            "{$wpdb->prefix}wc_reserved_stock",
        );

        /**
         * Filter the list of known WooCommerce tables.
         *
         * If WooCommerce plugins need to add new tables, they can inject them here.
         *
         * @param array $tables An array of WooCommerce-specific database table names.
         */
        $tables = apply_filters( 'woocommerce_install_get_tables', $tables );

        return $tables;
    }

    /**
     * Drop WooCommerce tables.
     *
     * @return void
     */
    public static function drop_tables() {
        global $wpdb;

        $tables = self::get_tables();

        foreach ( $tables as $table ) {
            $wpdb->query( "DROP TABLE IF EXISTS {$table}" ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
        }
    }

    /**
     * Uninstall tables when MU blog is deleted.
     *
     * @param array $tables List of tables that will be deleted by WP.
     *
     * @return string[]
     */
    public static function wpmu_drop_tables( $tables ) {
        return array_merge( $tables, self::get_tables() );
    }

    /**
     * Create roles and capabilities.
     */
    public static function create_roles() {
        global $wp_roles;

        if ( ! class_exists( 'WP_Roles' ) ) {
            return;
        }

        if ( ! isset( $wp_roles ) ) {
            $wp_roles = new WP_Roles(); // @codingStandardsIgnoreLine
        }

        // Dummy gettext calls to get strings in the catalog.
        /* translators: user role */
        _x( 'Customer', 'User role', 'woocommerce' );
        /* translators: user role */
        _x( 'Shop manager', 'User role', 'woocommerce' );

        // Customer role.
        add_role(
            'customer',
            'Customer',
            array(
                'read' => true,
            )
        );

        // Shop manager role.
        add_role(
            'shop_manager',
            'Shop manager',
            array(
                'level_9'                => true,
                'level_8'                => true,
                'level_7'                => true,
                'level_6'                => true,
                'level_5'                => true,
                'level_4'                => true,
                'level_3'                => true,
                'level_2'                => true,
                'level_1'                => true,
                'level_0'                => true,
                'read'                   => true,
                'read_private_pages'     => true,
                'read_private_posts'     => true,
                'edit_posts'             => true,
                'edit_pages'             => true,
                'edit_published_posts'   => true,
                'edit_published_pages'   => true,
                'edit_private_pages'     => true,
                'edit_private_posts'     => true,
                'edit_others_posts'      => true,
                'edit_others_pages'      => true,
                'publish_posts'          => true,
                'publish_pages'          => true,
                'delete_posts'           => true,
                'delete_pages'           => true,
                'delete_private_pages'   => true,
                'delete_private_posts'   => true,
                'delete_published_pages' => true,
                'delete_published_posts' => true,
                'delete_others_posts'    => true,
                'delete_others_pages'    => true,
                'manage_categories'      => true,
                'manage_links'           => true,
                'moderate_comments'      => true,
                'upload_files'           => true,
                'export'                 => true,
                'import'                 => true,
                'list_users'             => true,
                'edit_theme_options'     => true,
            )
        );

        $capabilities = self::get_core_capabilities();

        foreach ( $capabilities as $cap_group ) {
            foreach ( $cap_group as $cap ) {
                $wp_roles->add_cap( 'shop_manager', $cap );
                $wp_roles->add_cap( 'administrator', $cap );
            }
        }
    }

    /**
     * Get capabilities for WooCommerce - these are assigned to admin/shop manager during installation or reset.
     *
     * @return array
     */
    public static function get_core_capabilities() {
        $capabilities = array();

        $capabilities['core'] = array(
            'manage_woocommerce',
            'view_woocommerce_reports',
        );

        $capability_types = array( 'product', 'shop_order', 'shop_coupon' );

        foreach ( $capability_types as $capability_type ) {

            $capabilities[ $capability_type ] = array(
                // Post type.
                "edit_{$capability_type}",
                "read_{$capability_type}",
                "delete_{$capability_type}",
                "edit_{$capability_type}s",
                "edit_others_{$capability_type}s",
                "publish_{$capability_type}s",
                "read_private_{$capability_type}s",
                "delete_{$capability_type}s",
                "delete_private_{$capability_type}s",
                "delete_published_{$capability_type}s",
                "delete_others_{$capability_type}s",
                "edit_private_{$capability_type}s",
                "edit_published_{$capability_type}s",

                // Terms.
                "manage_{$capability_type}_terms",
                "edit_{$capability_type}_terms",
                "delete_{$capability_type}_terms",
                "assign_{$capability_type}_terms",
            );
        }

        return $capabilities;
    }

    /**
     * Remove WooCommerce roles.
     */
    public static function remove_roles() {
        global $wp_roles;

        if ( ! class_exists( 'WP_Roles' ) ) {
            return;
        }

        if ( ! isset( $wp_roles ) ) {
            $wp_roles = new WP_Roles(); // @codingStandardsIgnoreLine
        }

        $capabilities = self::get_core_capabilities();

        foreach ( $capabilities as $cap_group ) {
            foreach ( $cap_group as $cap ) {
                $wp_roles->remove_cap( 'shop_manager', $cap );
                $wp_roles->remove_cap( 'administrator', $cap );
            }
        }

        remove_role( 'customer' );
        remove_role( 'shop_manager' );
    }

    /**
     * Create files/directories.
     */
    private static function create_files() {
        // Bypass if filesystem is read-only and/or non-standard upload system is used.
        if ( apply_filters( 'woocommerce_install_skip_create_files', false ) ) {
            return;
        }

        // Install files and folders for uploading files and prevent hotlinking.
        $upload_dir      = wp_get_upload_dir();
        $download_method = get_option( 'woocommerce_file_download_method', 'force' );

        $files = array(
            array(
                'base'    => $upload_dir['basedir'] . '/woocommerce_uploads',
                'file'    => 'index.html',
                'content' => '',
            ),
            array(
                'base'    => WC_LOG_DIR,
                'file'    => '.htaccess',
                'content' => 'deny from all',
            ),
            array(
                'base'    => WC_LOG_DIR,
                'file'    => 'index.html',
                'content' => '',
            ),
            array(
                'base'    => $upload_dir['basedir'] . '/woocommerce_uploads',
                'file'    => '.htaccess',
                'content' => 'redirect' === $download_method ? 'Options -Indexes' : 'deny from all',
            ),
        );

        foreach ( $files as $file ) {
            if ( wp_mkdir_p( $file['base'] ) && ! file_exists( trailingslashit( $file['base'] ) . $file['file'] ) ) {
                $file_handle = @fopen( trailingslashit( $file['base'] ) . $file['file'], 'wb' ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged, WordPress.WP.AlternativeFunctions.file_system_read_fopen
                if ( $file_handle ) {
                    fwrite( $file_handle, $file['content'] ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_fwrite
                    fclose( $file_handle ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_read_fclose
                }
            }
        }

        // Create attachment for placeholders.
        self::create_placeholder_image();
    }

    /**
     * Create a placeholder image in the media library.
     *
     * @since 3.5.0
     */
    private static function create_placeholder_image() {
        $placeholder_image = get_option( 'woocommerce_placeholder_image', 0 );

        // Validate current setting if set. If set, return.
        if ( ! empty( $placeholder_image ) ) {
            if ( ! is_numeric( $placeholder_image ) ) {
                return;
            } elseif ( $placeholder_image && wp_attachment_is_image( $placeholder_image ) ) {
                return;
            }
        }

        $upload_dir = wp_upload_dir();
        $source     = WC()->plugin_path() . '/assets/images/placeholder-attachment.png';
        $filename   = $upload_dir['basedir'] . '/woocommerce-placeholder.png';

        if ( ! file_exists( $filename ) ) {
            copy( $source, $filename ); // @codingStandardsIgnoreLine.
        }

        if ( ! file_exists( $filename ) ) {
            update_option( 'woocommerce_placeholder_image', 0 );
            return;
        }

        $filetype   = wp_check_filetype( basename( $filename ), null );
        $attachment = array(
            'guid'           => $upload_dir['url'] . '/' . basename( $filename ),
            'post_mime_type' => $filetype['type'],
            'post_title'     => preg_replace( '/\.[^.]+$/', '', basename( $filename ) ),
            'post_content'   => '',
            'post_status'    => 'inherit',
        );
        $attach_id  = wp_insert_attachment( $attachment, $filename );

        update_option( 'woocommerce_placeholder_image', $attach_id );

        // Make sure that this file is included, as wp_generate_attachment_metadata() depends on it.
        require_once ABSPATH . 'wp-admin/includes/image.php';

        // Generate the metadata for the attachment, and update the database record.
        $attach_data = wp_generate_attachment_metadata( $attach_id, $filename );
        wp_update_attachment_metadata( $attach_id, $attach_data );
    }

    /**
     * Show action links on the plugin screen.
     *
     * @param mixed $links Plugin Action links.
     *
     * @return array
     */
    public static function plugin_action_links( $links ) {
        $action_links = array(
            'settings' => '<a href="' . admin_url( 'admin.php?page=wc-settings' ) . '" aria-label="' . esc_attr__( 'View WooCommerce settings', 'woocommerce' ) . '">' . esc_html__( 'Settings', 'woocommerce' ) . '</a>',
        );

        return array_merge( $action_links, $links );
    }

    /**
     * Show row meta on the plugin screen.
     *
     * @param mixed $links Plugin Row Meta.
     * @param mixed $file  Plugin Base file.
     *
     * @return array
     */
    public static function plugin_row_meta( $links, $file ) {
        if ( WC_PLUGIN_BASENAME !== $file ) {
            return $links;
        }

        $row_meta = array(
            'docs'    => '<a href="' . esc_url( apply_filters( 'woocommerce_docs_url', 'https://docs.woocommerce.com/documentation/plugins/woocommerce/' ) ) . '" aria-label="' . esc_attr__( 'View WooCommerce documentation', 'woocommerce' ) . '">' . esc_html__( 'Docs', 'woocommerce' ) . '</a>',
            'apidocs' => '<a href="' . esc_url( apply_filters( 'woocommerce_apidocs_url', 'https://docs.woocommerce.com/wc-apidocs/' ) ) . '" aria-label="' . esc_attr__( 'View WooCommerce API docs', 'woocommerce' ) . '">' . esc_html__( 'API docs', 'woocommerce' ) . '</a>',
            'support' => '<a href="' . esc_url( apply_filters( 'woocommerce_community_support_url', 'https://wordpress.org/support/plugin/woocommerce/' ) ) . '" aria-label="' . esc_attr__( 'Visit community forums', 'woocommerce' ) . '">' . esc_html__( 'Community support', 'woocommerce' ) . '</a>',
        );

        if ( WCConnectionHelper::is_connected() ) {
            $row_meta['premium_support'] = '<a href="' . esc_url( apply_filters( 'woocommerce_support_url', 'https://woocommerce.com/my-account/create-a-ticket/' ) ) . '" aria-label="' . esc_attr__( 'Visit premium customer support', 'woocommerce' ) . '">' . esc_html__( 'Premium support', 'woocommerce' ) . '</a>';
        }

        return array_merge( $links, $row_meta );
    }

    /**
     * Get slug from path and associate it with the path.
     *
     * @param array  $plugins Associative array of plugin files to paths.
     * @param string $key Plugin relative path. Example: woocommerce/woocommerce.php.
     */
    private static function associate_plugin_file( $plugins, $key ) {
        $path                 = explode( '/', $key );
        $filename             = end( $path );
        $plugins[ $filename ] = $key;
        return $plugins;
    }

    /**
     * Install a plugin from .org in the background via a cron job (used by
     * installer - opt in).
     *
     * @param string $plugin_to_install_id Plugin ID.
     * @param array  $plugin_to_install Plugin information.
     *
     * @throws Exception If unable to proceed with plugin installation.
     * @since  2.6.0
     */
    public static function background_installer( $plugin_to_install_id, $plugin_to_install ) {
        // Explicitly clear the event.
        $args = func_get_args();

        if ( ! empty( $plugin_to_install['repo-slug'] ) ) {
            require_once ABSPATH . 'wp-admin/includes/file.php';
            require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
            require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
            require_once ABSPATH . 'wp-admin/includes/plugin.php';

            WP_Filesystem();

            $skin              = new Automatic_Upgrader_Skin();
            $upgrader          = new WP_Upgrader( $skin );
            $installed_plugins = array_reduce( array_keys( get_plugins() ), array( __CLASS__, 'associate_plugin_file' ) );
            if ( empty( $installed_plugins ) ) {
                $installed_plugins = array();
            }
            $plugin_slug = $plugin_to_install['repo-slug'];
            $plugin_file = isset( $plugin_to_install['file'] ) ? $plugin_to_install['file'] : $plugin_slug . '.php';
            $installed   = false;
            $activate    = false;

            // See if the plugin is installed already.
            if ( isset( $installed_plugins[ $plugin_file ] ) ) {
                $installed = true;
                $activate  = ! is_plugin_active( $installed_plugins[ $plugin_file ] );
            }

            // Install this thing!
            if ( ! $installed ) {
                // Suppress feedback.
                ob_start();

                try {
                    $plugin_information = plugins_api(
                        'plugin_information',
                        array(
                            'slug'   => $plugin_slug,
                            'fields' => array(
                                'short_description' => false,
                                'sections'          => false,
                                'requires'          => false,
                                'rating'            => false,
                                'ratings'           => false,
                                'downloaded'        => false,
                                'last_updated'      => false,
                                'added'             => false,
                                'tags'              => false,
                                'homepage'          => false,
                                'donate_link'       => false,
                                'author_profile'    => false,
                                'author'            => false,
                            ),
                        )
                    );

                    if ( is_wp_error( $plugin_information ) ) {
                        throw new Exception( $plugin_information->get_error_message() );
                    }

                    $package  = $plugin_information->download_link;
                    $download = $upgrader->download_package( $package );

                    if ( is_wp_error( $download ) ) {
                        throw new Exception( $download->get_error_message() );
                    }

                    $working_dir = $upgrader->unpack_package( $download, true );

                    if ( is_wp_error( $working_dir ) ) {
                        throw new Exception( $working_dir->get_error_message() );
                    }

                    $result = $upgrader->install_package(
                        array(
                            'source'                      => $working_dir,
                            'destination'                 => WP_PLUGIN_DIR,
                            'clear_destination'           => false,
                            'abort_if_destination_exists' => false,
                            'clear_working'               => true,
                            'hook_extra'                  => array(
                                'type'   => 'plugin',
                                'action' => 'install',
                            ),
                        )
                    );

                    if ( is_wp_error( $result ) ) {
                        throw new Exception( $result->get_error_message() );
                    }

                    $activate = true;

                } catch ( Exception $e ) {
                    WC_Admin_Notices::add_custom_notice(
                        $plugin_to_install_id . '_install_error',
                        sprintf(
                            // translators: 1: plugin name, 2: error message, 3: URL to install plugin manually.
                            __( '%1$s could not be installed (%2$s). <a href="%3$s">Please install it manually by clicking here.</a>', 'woocommerce' ),
                            $plugin_to_install['name'],
                            $e->getMessage(),
                            esc_url( admin_url( 'index.php?wc-install-plugin-redirect=' . $plugin_slug ) )
                        )
                    );
                }

                // Discard feedback.
                ob_end_clean();
            }

            wp_clean_plugins_cache();

            // Activate this thing.
            if ( $activate ) {
                try {
                    add_action( 'add_option_mailchimp_woocommerce_plugin_do_activation_redirect', array( __CLASS__, 'remove_mailchimps_redirect' ), 10, 2 );
                    $result = activate_plugin( $installed ? $installed_plugins[ $plugin_file ] : $plugin_slug . '/' . $plugin_file );

                    if ( is_wp_error( $result ) ) {
                        throw new Exception( $result->get_error_message() );
                    }
                } catch ( Exception $e ) {
                    WC_Admin_Notices::add_custom_notice(
                        $plugin_to_install_id . '_install_error',
                        sprintf(
                            // translators: 1: plugin name, 2: URL to WP plugin page.
                            __( '%1$s was installed but could not be activated. <a href="%2$s">Please activate it manually by clicking here.</a>', 'woocommerce' ),
                            $plugin_to_install['name'],
                            admin_url( 'plugins.php' )
                        )
                    );
                }
            }
        }
    }

    /**
     * Removes redirect added during MailChimp plugin's activation.
     *
     * @param string $option Option name.
     * @param string $value  Option value.
     */
    public static function remove_mailchimps_redirect( $option, $value ) {
        // Remove this action to prevent infinite looping.
        remove_action( 'add_option_mailchimp_woocommerce_plugin_do_activation_redirect', array( __CLASS__, 'remove_mailchimps_redirect' ) );

        // Update redirect back to false.
        update_option( 'mailchimp_woocommerce_plugin_do_activation_redirect', false );
    }

    /**
     * Install a theme from .org in the background via a cron job (used by installer - opt in).
     *
     * @param string $theme_slug Theme slug.
     *
     * @throws Exception If unable to proceed with theme installation.
     * @since  3.1.0
     */
    public static function theme_background_installer( $theme_slug ) {
        // Explicitly clear the event.
        $args = func_get_args();

        if ( ! empty( $theme_slug ) ) {
            // Suppress feedback.
            ob_start();

            try {
                $theme = wp_get_theme( $theme_slug );

                if ( ! $theme->exists() ) {
                    require_once ABSPATH . 'wp-admin/includes/file.php';
                    include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
                    include_once ABSPATH . 'wp-admin/includes/theme.php';

                    WP_Filesystem();

                    $skin     = new Automatic_Upgrader_Skin();
                    $upgrader = new Theme_Upgrader( $skin );
                    $api      = themes_api(
                        'theme_information',
                        array(
                            'slug'   => $theme_slug,
                            'fields' => array( 'sections' => false ),
                        )
                    );
                    $result   = $upgrader->install( $api->download_link );

                    if ( is_wp_error( $result ) ) {
                        throw new Exception( $result->get_error_message() );
                    } elseif ( is_wp_error( $skin->result ) ) {
                        throw new Exception( $skin->result->get_error_message() );
                    } elseif ( is_null( $result ) ) {
                        throw new Exception( 'Unable to connect to the filesystem. Please confirm your credentials.' );
                    }
                }

                switch_theme( $theme_slug );
            } catch ( Exception $e ) {
                WC_Admin_Notices::add_custom_notice(
                    $theme_slug . '_install_error',
                    sprintf(
                        // translators: 1: theme slug, 2: error message, 3: URL to install theme manually.
                        __( '%1$s could not be installed (%2$s). <a href="%3$s">Please install it manually by clicking here.</a>', 'woocommerce' ),
                        $theme_slug,
                        $e->getMessage(),
                        esc_url( admin_url( 'update.php?action=install-theme&theme=' . $theme_slug . '&_wpnonce=' . wp_create_nonce( 'install-theme_' . $theme_slug ) ) )
                    )
                );
            }

            // Discard feedback.
            ob_end_clean();
        }
    }
}

WC_Install::init();